Your main textbook is available for free online. You can find all of the chapters individually or you can download a PDF of both volumes on this website:
Both volumes are also available for purchase via hard copy here:
You will also need Diana Hacker’s A Writer’s Reference. This is a handbook that is commonly used in many UAF writing classes, so it might be worth it to keep a copy after the semester is over. You will NEED it for this course and for your next writing course. It is available for purchase both online and in hard copy.